1. Which of the expressions below has a sum of 0? Select all that apply. A) -18 + 81
B) -12 + 12
C) -6 + 6
D) 12 + (-21)
E) 3.3 + (-3.3)

-2

7 - 9 = -2

reversed:

-2 + 9 = 7

the total estimated nappy use.=10,500,000

step-by-step explanation:

given that on an average the average baby uses 3528 napkins.

in a particular year 2014, the number of births were 299697 in new south wales.

rounding off the number of births to the nearest hundred thousand we have

no of birtsh = 300000

also rounding off the average usage to nearst thousand we get

average use of a baby = 3500

hence total number of nappy estimated to be used = 3500x300000

= 10,500,000

answer is 10,500,000 nappies

7

step-by-step explanation: